Here are some links to other pre-war card and related sites.
Baseball Games – Forum dedicated to older baseball games
Caramel Cards – Up close look at various caramel card issues
CubanBaseballCards.com – Site focusing on Cuban and Latin American baseball cards
Louisiana Cards – Site reference for Louisiana issues
Net54 – Online community of pre-war card collectors
Number 5 Type Collection Blog – Vintage baseball card blog
Open Checklist – Find card checklists for virtually every baseball player
Old Baseball Cards (OBC) – Group of vintage baseball card collectors
Old Cardboard – Site focusing on vintage cards
Sports Collectors Daily – Site providing latest trading card and memorabilia news
T205.org – Site dedicated to the T205 gold border set
T206.org – Site dedicated to the T206 white border set
VintageBasketball.com – Site dedicated to early basketball cards
In addition, thanks to the following people/organizations for their use of photos for this site.